Finding the Fourth Proportional to 78.69, 117.86 and 38.03

Step by Step Solution

1. Step 1: Write the proportion equation
   78.69 : 117.86 = 38.03 : x
2. Step 2: Convert to fraction form
   78.69/117.86 = 38.03/x
3. Step 3: Cross multiply
   78.69x = 117.86 × 38.03
4. Step 4: Simplify right side
   78.69x = 4,481.72
5. Step 5: Solve for x
   x = 4,481.72/78.69
6. Step 6: Final answer
   x = 56.96